Wrong yellow underlined with constructor

[danjiun]

Hi my friends.
I want to ask if this is problem of Qt Creator. (I use Qt Creator 3.5.0 opensource based on Qt 5.5.0, and use C++11)
I write a next code :

int c = 0;
for(int a=0;a<m_s;a++) {
        for(int b=0;b<m_s;b++) {
            m_substCodeToPair[c] = std::pair<int,int>(a,b);
            c++;
        }
    }
}

int c = 0;
for(int a=0;a<m_s;a++) {
        for(int b=0;b<m_s;b++) {
            m_substCodeToPair[c] = std::pair<int,int>(a,b);
            c++;
        }
    }
}

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pair appear with a yellow-green underline, and if i move my mouse there it tell me "Too few arguments"
If a compile, it compile fine, but Qt Creator always underline there.
What i can do in order to remove this warning underline ?
Daniel